I called the spyder dealer I bought my 2011 RT from. I asked the parts guy if they had a plug and play trailer wiring harness for the old spyder. He said he would check if he had or and put me on hold. After listening to that aweful music for 3 minutes he came back on the phone. First he said no he doesn't have one. Then to my shock he said he don't know where to get them from and that I should check with some of the truck stops that they might have one or something that might work for my needs to get my lights to work on my trailer from my 2011 RT. I just hung up the phone and shook my head and wondered how he got to be a parts salesman.